Finally got myself a Burris FastFire II for my FNP-45 Tactical. This is my first MRDS, and have a quick question on mounting.

It says I need to mount the gasket plate under the sight for waterproofing/resistance. I Assume this to be that gasket plate:
IF so, then the kit also includes a thicker firmer "gasket plate", which to me is more like a shim. IS it a MOA shim (for elevation adjustments), or is it the "gasket" plate?

Finally got myself a Burris FastFire II for my FNP-45 Tactical. This is my first MRDS, and have a quick question on mounting.

It says I need to mount the gasket plate under the sight for waterproofing/resistance. I Assume this to be that gasket plate:
IF so, then the kit also includes a thicker firmer "gasket plate", which to me is more like a shim. IS it a MOA shim (for elevation adjustments), or is it the "gasket" plate?

Click to expand...

The gasket is flexible rubber/polymer and paper thin.

Shim is pretty obvious as one end is thicker than the other.

I used the gasket at first but then didn't put it back on after I changed the battery. Never shoot my guns in rainy/wet conditions so it seemed like overkill.

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